boost::shared_ptr<Track> rt = boost::dynamic_pointer_cast<Track> (rp);
_record_enable_control.reset (new RecordEnableControl (_session, EventTypeMap::instance().to_symbol (RecEnableAutomation), *this));
boost::shared_ptr<Track> rt = boost::dynamic_pointer_cast<Track> (rp);
_record_enable_control.reset (new RecordEnableControl (_session, EventTypeMap::instance().to_symbol (RecEnableAutomation), *this));